字符的截取 和 时间的设置

//把时间字符串转换成标准时间

let formatter = NSDateFormatter()

//设置时区

formatter.locale = NSLocale(localeIdentifier:"cn")
//设置日期格式

/*
E :  星期

M :  月份

d :日

H :24 小时

m: 分

s :秒

y : 年

Zone - > Z

*/

formatter.dateFormat = "EEE MMM dd HH:mm:ss Z yyyy"

if let ceartDate = created_at {

let date = formatter.dateFromString(ceartDate)

//获取当前日历

let locendar = NSCalendar.currentCalendar()

//设置要获取的比较

let unites = NSCalendarUnit(arrayLiteral: .Year,.Month,.Day,.Hour,.Minute)

//进行比较

if let dateOne = date {

let compts = locendar.components(unites, fromDate: dateOne, toDate: NSDate(), options: [])

if compts.year == 0
{

if compts.day == 0{

if compts.hour == 0{

if compts.minute == 0{

created_date = "刚刚"

}else {

created_date = "\(compts.minute)分钟"

}

}else {

created_date = "\(compts.hour)小时前"

}

} else if compts.day == 1 {

formatter.dateFormat = "HH:mm"

let str = formatter.stringFromDate(dateOne)

created_date = "昨天\(str)"

}

} else {

//其他月 MM -dd HH :mm

formatter.dateFormat = "MM -dd HH :mm"

let str = formatter.stringFromDate(dateOne)

created_date = "\(str)"

}

}else {

//其他月 MM -dd HH :mm

formatter.dateFormat = "MM -dd HH :mm"

let str = formatter.stringFromDate(dateOne)

created_date = "\(str)"

}

}

}

}

}

var sourcedata :String?

/// 微博来源
var source: String? {

didSet {

// 判断不能为空

guard let _ = source else {

return
}

let soureStr = source?.componentsSeparatedByString(">")

if soureStr?.count > 1{

let str = soureStr?[1]

let strTwo = str?.componentsSeparatedByString("<")

sourcedata = strTwo?.first
}

}